Finding just the right gift for a significant other sometimes means relying on hints; this is especially true if you are a bird and your significant other is also a bird. Even the cleverest corvids aren't great with wish lists. Male Eurasian jays, though, seem to be able to deduce which treats their mates want most.
Sharing food is an important courtship ritual for the Eurasian jay (Garrulus glandarius). Passing snacks to each other helps the birds form, and nourish, long-term […]
Ostojic, L., Shaw, R., Cheke, L. & Clayton, N. (2013). Evidence suggesting that desire-state attribution may govern food sharing in Eurasian jays, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.1209926110